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The way most people pay income tax and the way most people earn it have drifted apart. Employees pay as they earn, month by month through PAYE. Anyone in Self Assessment typically pays in one or two large instalments, sometimes long after the income arrived. The Treasury has now answered a long-standing question — should Self Assessment tax be collected closer to the day the income is earned? — with a yes for one group of taxpayers, and an open consultation for the rest.

That answer sits at the heart of a 2026 consultation on "timely payments" in Income Tax Self Assessment. For taxpayers with sufficient PAYE income, in-year payment from April 2029 was announced at Budget 2025, and the consultation covers how it will work. For everyone else in Self Assessment, more frequent payment remains a genuinely open question. Taken together, this would be one of the biggest changes to how the UK collects income tax in a generation, landing alongside Making Tax Digital to reshape the rhythm of a client's tax year. None of it is enacted law yet, which makes this the right moment to understand it calmly.

This guide explains what the proposal actually says, who would be affected first, what it would mean for cash flow, and how it connects to the wider shift towards continuous compliance.

• Self Assessment tax is moving "closer to payday" — announced at Budget 2025 for taxpayers with sufficient PAYE income, and under consultation for everyone else.
• The consultation ran from 23 June to 4 August 2026, with a government response due in Autumn 2026 and implementation from April 2029.
• Around 12 million people file a Self Assessment return; roughly 7 million of them also have PAYE income, and a first wave of about 2.1 million carry enough PAYE to make in-year collection workable.
• The change would compress the gap between earning and paying, narrowing the cash-flow float many small businesses rely on.
• Nothing is enacted law yet. In-year payment via PAYE is announced policy for the first wave; wider reform is only a consultation. The job now is to understand the changes and model the cash-flow effect, not to change anything.

The phrase describes collecting tax nearer to the point income is earned, instead of settling it well after the tax year has ended.

Under Self Assessment, tax on non-PAYE income is typically paid after the fact. For many, that means a large bill in January, sometimes more than a year after some of the income was earned. Payments on Account spread part of the burden, but the underlying model still asks people to set money aside for months and pay it in bulk. The Treasury's concern is that this gap invites both hardship and error: money meant for tax gets spent, and a large annual bill lands as a shock.

Timely payments would move collection towards the present. Rather than one or two big instalments, tax would be taken in-year, closer to when the income lands. For people who also earn through PAYE, the government has already announced that the existing PAYE channel will be used to collect forecasted Self Assessment liability during the year; what the consultation covers is the design — forecasting, safeguards and the transition.

The consultation notes that of the roughly 12 million Self Assessment filers, around 7 million also have PAYE income, and about 2.1 million of those carry enough PAYE to make in-year collection practical in a first wave. The roughly 9.5 million filers outside the PAYE route — including around 4.5 million with no PAYE income at all, plus those whose PAYE income is too small to collect through payroll — present a harder design problem, which is why reform for them is a consultation question rather than announced policy.

The proposal is deliberately phased, and the timeline is longer than the headlines suggest.

The consultation ran from 23 June to 4 August 2026, with a government response due in Autumn 2026 and legislation to follow in a Finance Bill. For the first wave, in-year payment through PAYE begins from April 2029; any wider reform of Payments on Account would start no earlier than the same date. That is a long runway by design, giving HMRC, software providers and taxpayers time to prepare. Nothing changes in the meantime.

The first group is people who already have a PAYE relationship, because the machinery to collect in-year already exists for them. Budget 2025 announced that this group will pay their forecasted liability in-year through PAYE, and the consultation identifies around 2.1 million taxpayers with enough PAYE income to fall within scope. For them, some of the Self Assessment bill could be collected through the year rather than in a lump afterwards.

People with no PAYE income — or too little PAYE to collect through payroll — are a different challenge. Collecting in-year from them requires new mechanisms, and this is exactly the sort of detail a consultation exists to work through. Expect this group to be handled later and more carefully, if at all in the first phase.

For clients, the practical consequence is not the tax rate, which does not change, but the timing, which changes a great deal.

The gap between earning income and paying tax on it is, in effect, an interest-free float. Many small businesses use that float as working capital through the year, then settle up in January. Collecting tax closer to payday narrows that float. The total tax is the same, but the money leaves sooner, and a business that has leaned on the delay will feel it.

Set against that, in-year collection smooths the bill. A calmer January, with no single large payment, is genuinely easier for many taxpayers to manage. The trade is a tighter monthly rhythm in exchange for fewer year-end shocks.

For exposed clients, the useful work is to model what continuous payment would do to their working capital. Which clients rely on the float? How large is their typical January bill relative to their cash position? Answering those questions now, while the change is years away, turns a future adjustment into a planned one.

Timely payments does not arrive in isolation. It is the payment-side companion to a reporting-side change already underway.

Making Tax Digital for ITSA is pulling reporting into quarterly updates. Timely payments would pull payment towards the present. Together they move the UK system from an annual, look-back model towards a continuous, near-real-time one. Reporting and payment become two halves of the same machine.

A continuous system rewards being current. When both reporting and payment happen through the year, a client cannot rely on a long reconciliation afterwards to catch mistakes. That raises the value of getting each answer right, and defensible, the first time. This is where a research tool that returns answers grounded in current legislation, with the source shown, earns its keep, and where the wider question of choosing the right AI tax research software becomes practical rather than theoretical.

Timely payments is a big idea wearing a modest name. It would not change how much Self Assessment tax anyone pays, but it would change when they pay it, compressing the gap between earning and settling and completing the shift, alongside Making Tax Digital, from an annual system to a continuous one.

The consultation closed on 4 August 2026, a government response is due in Autumn 2026, and implementation is years out in 2029. The right response is to understand the proposal, identify the clients whose cash flow depends on the current timing, and be ready to advise with the facts rather than the fear. The advisers who do well in a continuous system are the ones who can tell a client, on any given day, exactly what is owed and exactly what has merely been proposed.

To see how a current, sourced answer looks on a live question, create a free GAIN Tax account.

What is "tax closer to payday"?

It is the informal name for the Treasury's plan to collect Self Assessment income tax nearer to when income is earned, in-year, rather than in large instalments after the tax year. It was announced at Budget 2025 and is detailed in the 2026 consultation on timely payments in ITSA.

When would this start?

From April 2029 for taxpayers with sufficient PAYE income; any wider reform would follow the same timeline at the earliest. The consultation ran from 23 June to 4 August 2026, with a government response due in Autumn 2026 and legislation in a Finance Bill before implementation.

Who would be affected first?

The first wave is the roughly 2.1 million Self Assessment taxpayers with enough PAYE income to fall within scope — for them the change is announced policy, because the collection machinery already exists.

Will I pay more tax under timely payments?

No. The proposal changes the timing of payment, not the amount. The concern for businesses is cash flow: tax would leave sooner, narrowing the interest-free gap between earning and paying that many use as working capital.

Is this the same as Making Tax Digital?

No, but they are related. Making Tax Digital changes reporting to quarterly updates; timely payments would change when tax is paid. Together they move the system towards continuous, near-real-time compliance.

Is timely payments now law?

No. For taxpayers with sufficient PAYE income, in-year payment from April 2029 is announced government policy awaiting legislation in a Finance Bill. For other taxpayers it remains a consultation only. Treat nothing as binding until it appears in enacted legislation.